Acoustic transducer and magnetizing current controller

A method comprising:

• receiving an input audio signal;
• generating, with a controller, a first reference signal indicative of an envelope of the input audio signal:
• providing a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal;
• measuring current through the stationary coil after providing the stationary coil signal to the stationary coil;
• generating a first output indicative of the current through the stationary coil;
• determining a magnetic flux in an air gap of magnetic material of the acoustic transducer based on the first output;
• and
• generating a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap, the voltage output providing an undistorted output that corresponds to the input audio signal.

An acoustic transducer arrangement comprising:

• a controller configured to:
• receive an input audio signal,
• generate a first reference signal indicative of an envelope of the input audio signal,
• provide a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal;
• measure a current through the stationary coil after providing the stationary coil signal to the stationary coil;
• generate a first output indicative of the current through the stationary coil;
• determine a magnetic flux in an air gap of magnetic material based on the first output;
• and
• generate a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap, the voltage output providing an undistorted output that corresponds to the input audio signal.